Sample Design Calculations Page 11
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37C
SAMPLE DESIGN CALCULATIONS
APPENDIX
EXAMPLE C2. CALCULATE LATERAL LOADS (continued)
From ASCE 7-10 Table 27.3-1, compute velocity pressure exposure coefficients (K
) at heights listed
z
above:
• For
,
• For
,
by linear interpolation
Use topographic factor,
since house is surrounded by flat, open terrain
From ASCE 7-10 Table 26.6-1, use directionality factor,
for buildings
24.5 lb/ft
2
26.0 lb/ft
2
Calculate Design Wind Pressures on Building Main Wind Force Resisting System, MWFRS (p)
using Equation 27.4-1 (ASCE 7-10)
From ASCE 7-10 Equation 27.3-1 use
, the velocity pressure computed for
windward walls calculated at wall height z
or z
above ground (lb/ft )
2
1
2
From ASCE 7-10 Equation 27.3-1, use
for all other walls and roof surfaces
(lb/ft
2
)
From ASCE 7-10 Section 26.9.1, use gust effect factor G = 0.85 for rigid structures
From ASCE 7-10 Figure 27.4-1, compute external pressure coefficients (C
) for the following
p
scenarios:
• Perpendicular to the ridge, where:
a. For windward walls,
b. For leeward walls,
,
c. For windward roof,
,
,
and -0.12 by
linear interpolation
d. For leeward roof,
,
,
by linear
interpolation
C-11
ENGINEERING PRINCIPLES AND PRACTICES for Retrofitting Flood-Prone Residential Structures
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Business